Dies for forging calking and yarning irons



Nov. 29. .1927 1,651,082 c. BAYLES ET AL DIES FQR FORGING CALKING AND YARNING IRONS Filed A112. 4, 1925 & wgya.

Patented Nov. 29, 1927.

UNITED STATES 1,651,082 PATENT 1 OFFICE.

LEWis oi BAYLES, or EASTON, PENNSYLVANIA, AND HOWARD W. MORROW, 0F PHIL- LIPSBURG, NEW JERSEY, ASSIGNORS T0 IlIGERSOLL-RAND COMPANY, on JERSEY 011 31, NEW JE SE A CORPORATION OF NEW JERSEY.

DIES FOR FORGING CALKING AND YARNING IRONS.

Application filed August 4, 1925. Serial No. 48,016.

This invention relates to calking irons but more particularlv to a device for forming calking irons.

' One of the objects of the invention is to prevent excessive lateral displacement of the metal during the breaking down process.

Another object is to combine in a unitary structure, the breaking down, the finlsh ng and edging portions for forming .calking irons, and a still. further object is to enable W calking irons of various dimensions to be formed by a single pair of dies. 1

Other objects will be in part obvious and in part pointed out hereinafter. A v

The invention consists of the combinations of elements, features of construction and arrangement of parts having the general mode of operation substantially as hereinafter described and more particularly'pointed out in the appended claimsand illustrated in the accompanying drawings, in which Figure 1 is a perspective view of a bottom die constructed in accordance with the practiceof the invention, I

Figure 2 is a transverse sectional view through Figure 1 taken on the-line22,

Figure 3 is a side view of acalking iron showing the formation of said iron after the initial breaking down operation, A

Figure 4: is a top plan view of the iron shown in Figure 3,

' Figure 5 is a transverse sectional view through F igure 1 on the line 55 looking in the direction of the arrows and showing the manner in which the iron is edgedg Figure 6 is a perspective View of the iron illustrating he formation of said iron'after the first edging operation,

Figure 7 is a transverse sectional view through Figure l on the line 77 looking in the direction of the arrows illustrating the second or final breaking down operation,

Figure 8 is a top plan view of the iron illustrating the appearanceof the iron after the second breaking down operation illus trated in Figure 7,

Figure 9 1s a view SllnllllllO Figure 5 taken on the line 9-9 of Figure 1 showing the second or final edging operation,

Figure 10 1s a perspective view of the iron after the final edging operation,

Figure 111s a transverse sectional View through Figure 1 on the line 11-11 looking in the direction of the arrows illustrating the final forming operation. and p Figure 12 is a perspective View of the iron after the final forming operation illustrated in Figure 11. A 7 Referring to the draw ngs, and more particularly to Figure 1 in which is illustrated a bottom die -A comprising various stepped portions for breaking down, forming and edging calking irons or other-similar tools. The die A may be secured to a drop hammer or other forging machine in any suitable manner, but preferably remains stationary with respect to such apparatus. s V

In accordance with thepractice of theinvention, a prominence or portion B comprising the initial breaking down portion of the die A is formed transversely thereof and is relieved as at C so thatonly a small portion of a calking iron D may be interposed between said portion B and a reciprocatory top die E at each stroke of said top die E.

The portion B is preferably of a length equalling approximately the width of the formed portion of the iron D. After the top die E is again raised the unformed portion F adjacent the broken downor bit portion G of the iron Dfmay be inserted between the top and bottom dies until ap-: proximately the desired length has been broken down. This operation will form the 7 iron D as illustrated in Figures 3 and 4. Afterthe initial breaking down operation, the

iron D may be placed edgewise on an edging bit portion Gr of the iron D, said iron may be placed on a final breaking down portion K which may be adjacent the'breaking down portion B, and like the breaking down portion B, is also relieved as at L. The breaking down portion K is preferably somewhat shorter than the breaking down portion B so that a smaller portion of themetal may be exposed tothe blows ofthe top die E at each stroke. By thus shortening the portion K transverse expansion of the metal will be ished form as illustrated in Figure 12.

considerably less than would be the case if the portion K were increased in length. The metal is therefore expanded in a longitudinal direction rather than transversely. After the operation illustrated in Figure 7, the edges J of the iron D will again be corru gated somewhat in the same manner as they were after the first breaking down operation. In order to straighten said edges the iron D may again be placed on the edging portion H of the die as illustrated in Figure 9 and the top die E may be reciprocated to straighten the edges J as illustrated in Fig are 10.

Additional means are provided for finally forming the bit G to the desired thickness. To this end forming portions U, P, Q and B are formed transversely of the die and are so formed that various degrees of thickness of the bit Gr may be obtained during the final forming operation, that is, the forming portion (.1 is slightly higher than the adj acent potion R, and similarly the portion P is slightly higher thanthe portion Q, and the portion O is in turn slightly higher than the portion P. this instance, the portion O is that portion which will reduce the bit G to a minimum thickness, as illustrated in Figure 11. The iron will then assume the finwill be understood that any-number of similar forming portions may be included in a die of this type, depending upon the thickness of the iron D required.

.In order-to prevent the formation of sharp corners at the juncture of the bit and the shank of the iron D, the die A is radiused asat S to form a: corresponding radius on one side of the iron D. -By thus forming a radius on the iron a convenient means is pro vided for properly locatingthe iron on the die A for the succeeding operation. The radius'on the iron may then be abut-ted against the radius Sof the die A and in this-way the iron. D is protected against being in serted too far between the top die E and the bottom die A. p-ln order to prevent the forming of a similar radius on the back of the bit G at the juncture of said bit and the shank, the top die E preferably-overhangs or projects be yond the front edge of the bottom-sis] In this way,the shank of the iron D is automatically set at an angleto the bit G upon each blow of the die E, the angle thus formed being substantially the desired angle in an iron of this character. A if, however, it be desired to still further increase the angle of the bit G to the shank of the iron, the operator may, after the final operation and while the top die E isstill in the position indicated in'Figure 1, bear down upon the shank of the tool to form any convenient angle which may be desired. Y

Although the drawings show the forming faces of the dies A and E parallel with each other, it is to be understood that, the faces may taper somewhat to produce a corresponding taper on the iron. I The advantages of this invention reside chiefly in the fact that. the expansion of the metal comprising the tool may be regulated, that is to say,"instead of breaking down the entire portion comprising the bit G by one blow of the top'die, in which case the metal is expanded uniformly longitudinally and transversely, only a short portion of the metal is broken down at'each blow of the top die. bit tends to increase inlength rather than in breadth. Other advantages, are that thls construction permits offa compact devlce,

In this way the portion forming the and that irons of various thickness may be formed without necessitating the changingof dies. .1 V

We claim: 1 i

1. A pair of dies comprising a bottom die having a breaking down portion for break ing down calking irons and the'like, and a top die projecting beyond the edge of the bottom die for bending the unformed portion of the iron out of the longitudinal plane of the formed portion.

2. A pair of dies comprisinga bottom die having a breaking down portion for break ing down calkingironsand.the like s'aidthe width of the formed portion of the iron,

a radius at one end of the prominence to form a corresponding radius at the juncture of the formed and unforined portions of the tool and on one side thereof, and a reciprocable. top die having a projecting portion to extend beyond the front edge of the bottom die for bending the unformed portion of the iron out of the longitudinal plane of the formed portion during each blow of the top die.

H In testimony whereof wehave signed this specification. V

. LEWIS C. BAYLES.

v HOWARD W. MORROW. 

